EUVD-2026-73598
GHSA-c3q8-98v2-fxwr
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local low-privileged session required; kernel heap overflow is low-complexity with no user interaction, yielding full SYSTEM compromise scoped to the vulnerable host.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
4DescriptionCVE.org
Heap-based buffer overflow in HID class driver allows an authorized attacker to elevate privileges locally.
AnalysisAI
Heap-based buffer overflow in the Windows HID (Human Interface Device) class kernel driver enables local privilege escalation from a standard user account to SYSTEM-level code execution. All supported Windows 10, Windows 11, and Windows Server 2012 through 2025 builds are affected, giving this vulnerability an exceptionally broad surface across virtually every enterprise Windows fleet. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an authenticated local session with at minimum a standard (low-privileged) Windows user account, as confirmed by the CVSS AV:L/PR:L vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) is well-calibrated: local access with a low-privileged account is required, but once achieved the overflow is low-complexity and requires no user interaction, yielding full system compromise. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the Microsoft security update for your Windows build. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, catalog all Windows 10, 11, and Server 2012-2025 systems and segment by criticality and department. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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